Summary

Three months ago, researchers at the Deutsches Elektronen-Synchrotron (DESY) in Hamburg, Germany, caught what could have been a glimpse of an exotic new particle called a leptoquark, which would combine properties of the two basic kinds of matter (Science, 28 February, p.
1266). But a group at the Fermi National Accelerator Laboratory in Illinois has made an extensive search through its own data for evidence of similar particles and come up empty.